r k A for a reaction, 50% of A is decomposed in 120 minutes. The time taken for 90% decomposition of — JEE Mains Chemistry Past Papers Chemistry Question

💡 Solution & Explanation

:-  r k A  So, order of reaction = 1 1/2 t 120 min  For 90% completion of reaction 2.303 a k log t a x          1/2 0.693 2.303 log t t   t 399 min. 